Table of Contents
What is sori and its function?
Sori are clusters of sporangia found only in ferns (singular: sorus). These are a product of sexual reproduction. This is a specialized outgrowth of the leaf that functions in protection of the sporangia. This often has the shape of an upside down umbrella and shrivels before the spores are released.
Do sori produce gametes?
The sporangia are usually in clusters known as sori, found on the underside of the fern leaves. When the spores are mature, they are released from the sporangia. If a spore lands on a suitable site, it will germinate and grow via mitosis into a mature gametophyte plant. A gametophyte is the plant that produces gametes.
How are spores released from a sorus?
In lichens and other fungi, the sorus is surrounded by an external layer. Sori occur on the sporophyte generation, the sporangia within producing haploid meiospores. As the sporangia mature, the indusium shrivels so that spore release is unimpeded. The sporangia then burst and release the spores.
What reproductive structures are produced in a sorus?
In Botany, Sorus, (sori in plural), is a yellow-brown cluster of structures that produce spores (sporangia).
What cell is produced in the sori?
Sori occur on the sporophyte generation, the sporangia within producing haploid meiospores. As the sporangia mature, the indusium shrivels so that spore release is unimpeded.
What are called sori?
sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves. Reproductive structures called sori also occur in various species of marine algae. See also spore.
What do gametophytes produce?
In the gametophyte phase, which is haploid (having a single set of chromosomes), male and female organs (gametangia) develop and produce eggs and sperm (gametes) through simple mitosis for sexual reproduction.
What structures make up sori?
Sori (singular: sorus) are groups of sporangia (singular: sporangium), which contain spores. Sori are usually found on the underside of the blade. Young sori are commonly covered by flaps of protective tissue called indusia (singular: indusium).
What do the spores that are released by the fern sori grow to become?
Spore germination Released spores grow into a gametophytes – very small heart-shaped structures.
Why is sori covered with thick coat?
A sorus is a cluster of sporangia in ferns and fungi.In fungi and lichens, the sorus is surrounded by an external layer. In some red algae, it may take the form of a depression into the thallus. As the sporangia mature, the indusium shrivels so that spore release is unimpeded.
What is the definition of sori in biology?
Sorus, plural sori, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves.